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*Porcine circovirus in Postweaning multisystemic wasting syndrome (PMWS) in [[Respiratory Viral Infections - Pathology#Postweaning multisystemic wasting syndrome (PMWS)|respiratory disease]]
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=Introduction=
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Circoviruses are the smallest known viruses of vertebrates and plants, and cause immunosuppressive infections of pigs, poultry, and parrots.  No vaccines are currently available against them.
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=Morphology=
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*Genome is a single molecule of circular positive-sense DNA, which encodes for one major capsid protein
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=Virulence and Pathogenesis=
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*Viruses are '''very stable''' in the environment
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=Virus by Species=
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[[Avian Circoviruses]]
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[[Porcine Circoviruses]]
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